You are a OBD 1, the crack in the exhaust manifold will definetly effect the operation of the 02 sensor, and the vehicle will run rich, now as for the small amount of white smoke you can be describing condensation. Now do you have this white smoke at all time and are you loosing coolant? As for the muffler will it help with the emission test? No, The muffler is just for noise, if you dont have a catalytic thats a differnet story, You automatically fail the test.
Monday, February 25th, 2013 AT 6:02 AM